Shaft-coupling



(No Mo I G- BU SHAFT COUPL G.

Patented-Oct; 23, 1888. F1681.

Nb. 391,508. I

ainr

CHARLES D. BURK, OF PHILADELPHIA, PENNSYLVANIA.

SHAFT-COUPLING.

SPECIFICATION forming part of Letters Patent No. 391,508, dated October23, 1888.

Application filed July 25, 1887.- Serial No. 245,221. (No model.)

To all whom it may concern:

Be it known that 1, CHARLES DAVID BURK, a citizen of the United States,and a resident of Philadelphia, Pennsylvania, have invented certainImprovements in Shaft-Couplings, 850., of which the following is aspecification.

The object of my invention is to so construct a device for couplingshafts or securing wheels or pulleys to shafts that no specialpreparation of the shaft or shafts will be required, the device,moreover, comprising but few parts, of a cheap and simple character.

In the accompanying drawings, Figure l is a longitudinal section of thedevice employed as a shaft-coupling. Fig. 2 is an end view. Fig. 3 is atransverse section on the line 1 2, Fig. 1; and Figs. 4 and 5 aredetached perspective views of parts of the coupling.

A A are two shafts to be coupled, these shafts having at the adjoiningends the usual keyways, a, for the reception of a loose key, D.

B is the sleeve of the coupling, which is bored out for the reception ofthe ends of the shafts A A, and has at one side of the central bore, b,a longitudinal opening, 0, having a tapering enlargement, c, at each endand communicating with the central bore through a slot, 0 which receivesthe key D, the latter being tapered at the ends for the action ofcone-blocks F, carried by a bolt, E, which is contained in thelongitudinal opening 0 in the sleeve, one end of the bolt having ahead,6, forming a bearing for one cone-block, and the other end of the boltbeing threaded for the reception of a nut, e", which bears upon theopposite cone-block.

In effecting the coupling the ends of the shafts are inserted into thebore bof the sleeve and the key D slipped into its place in the keywaysa and slot 0 the tapered ends of the keys projecting slightly into thetapered ends 0 of the opening 0. The bolt E,with its headblock F, isthen inserted until said block enters its opening 0 at one end of thesleeve, the other cone-block being then slipped over the other end ofthe bolt and into the opposite opening, 0', and the nut 6 then appliedand screwed up, so as to cause the cone-blocks to bear forcibly upon theopposite tapered ends of the key D and press the same firmly into thekeyways of the shafts.

Screws 9 may be provided for centering the shafts in respect to thesleeve when desired.

It will be seen that no specialmreparation of the shafts other than theusual key-seating of the same is required in order to adapt them forcoupling, and the parts of the coupling are both few and simple, so thata very cheap coupling is produced.

It will be evident that the device may be used as a means of securing awheel or pulley to a shaft, the hub of the wheel in this case taking theplace of the sleeve 13.

I claim as my invention- The combination of a shaft or shafts having akeyway therein, a key adapted thereto, and a sleeve or hub having a boltwith cone-blocks bearing upon the key at its opposite ends, allsubstantially as specified.

In testimonywhereof I have signed. my name to this specification in thepresence of two subscribing witnesses.

CHARLES D. BURK.

\Vitnesses:

JOHN T. Lnwis, HARRY SMITH.

